Remove an old workaround that was kept around for ABI-compatibility on x86-64 between different LLVM versions. This means LLVM r67588 is required if you want to compile for x86-64, otherwise the backend will assert when you try to return e.g. struct { int i; char c; } from a function. (In particular, this is no longer compatible with LLVM 2.5) It also means that any code returning small structs on x86-64 will probably need to be recompiled in order to be linkable to code compiled with this change.

extern(C) int printf(char*, ...);

class BaseClass {} 
 
void main() 
{ 
    Object o_cr = BaseClass.classinfo.create();
    Object o_new = new BaseClass;
    printf("CIaddr: %X\n", cast(size_t*)BaseClass.classinfo);
    printf("Create: %X\n", cast(size_t*)o_cr.classinfo);
    printf("New:    %X\n", cast(size_t*)o_new.classinfo);
    assert(cast(size_t*)o_cr.classinfo == cast(size_t*)o_new.classinfo);
}